Carriage movement for typewriters



July 6, 1926. 1,591,168

47 A. LOCK CARRIAGE MOVEMENT FOR TYPEWRITERS July 6 1926.

' A. LOCK CARRIAGE MOVEMENT FOR TYPEWRITERS 2 .Shets-Sheet 2 Filed July 22, 1924 '20 "themoverhent of the oldouble armed lever,

. actuated by the type bars to'flie dog-rocker which controls the escapement wheel and. 1' thereby themovement of the platen fear- 25 I v II o Patented July; 6, 1926. i j

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i This invent-ion relates to escapement mechanism for controlling the. movement of the typewriter platen: carriage in front stroke HWewriting machines in which the 5 inio-vemient or spacing is prod-uceld by means 7 of a double-armed lever which-is struc k'by the type bars near the printing point.

In welLknown devices of th is kind, {the movement or spacing of the" carriage is gaging bymea'ns oftwo pawls or dogs with owing to a Wormrsecured tothe bottom end of thersp'indle produces-a rotation of the worm wheel engaging'wi-th the said worm and with the spacing wheel. ,I ,My invention has for its object to provide an improved-mechanism for transmitting riage. V 7 The invention has the advantage thatthe path described until the escapement wheel is. released, is considerably shortened, ow-

ing to which a quick vand reliable spacing is" ensured.

Aflfnrther advantage .ofjthe inventionis 7 that it enables ,.a much more compact ar rangement of'the parts :to be attained than. has hitherto been possible since, in the new' 35 a device, twosmallstraightlevers which take up little space are used and the dog-rocker and escapement wheel are situated behind thesaid levers. I I I In addition to its simplicity and the greatest possible reliability, the invention has the advantageover the well-known devices that the well-known noise and clatter I of the escapement'mechanism is reduced to shows the typewriter with the I escapement vl brought about by .the double-armed lever which is control-led 'by the type bars, 'en- II Furthermore, the newdevice can beused I I I I II I I ';p0rt l8 r estsf on a bracketfflrl. mounted onthe carriage support 23 accompanying drawing in which. Fig. 1'

'de-Vice and, carriage moving w nechamism, r

the invention has been applied; 4 1; shnws the escapement device; with parts of the carriage support in plan; Fig. 5 shows the same in side el-evation and Fig; :6 in trontel'evation; 1

I Ihety pe bars 3 con levers 1 by means of levers 2, engage with slots the segment A-and area-held by the through bearing pin 5-. f At the frontside of the segmei' t,- in the center of the same ec ted to -theifkey-a-zg I is mounted the type-guide 6 which is .se-

cured to the-segment by screws. To. the

back surface ofthe segment, also the f centre of same, is secured screws a bear- ,i-ng block 7. the said bearing block-are armed intermedfiatelever 15,. 16): engaging blocks" by means of bearing'pinsll O, 11 pass mount ed two doublelevers (viz, adojuble I *garmeduniversal lever 12,14 and a doubleiiig through the collar on the spindleofthe 13,: levers. The upper arm [1'2 lot the lnpper I lever carries; at ;end za "bufler 1.1.3" of, e] astic material'whichis arranged transversely of the lever arm, passes through ,a corresponding recessin the type-guide and forms an abutment forthe type levers,, The lower arm of the'iuppergleveris formed into a tongue andjengages with the arm .l5 ..lalso .formed into .a tongue%of the *lower lever.

The arm 16 o t'thellowerlever rests vagainst' an angle. stop 17 of, the {pawl support. I In addition to thedoubleermedlever -15, 16,.witl'1 the pawl support engages also a double-armed lever 20 I connected to. the'iline spacing .ke'y 19 1 The lever I 2'Q is.-.rotatably mounted bynieans nf'i-tsz collar in. an 'angle bracket 21 and held by'. means of apnea. The langlei bracket .21 secured by rscrevvs to, the carriage-support 28'." The'pawl sup;

is pivoted to ,it the pawl support are arranged side 1 by, sidetwo pawls- 26, 27 which are used-tor looking or releasing the escapernent wheel.

Of thesaid'pawls, th'e'fpawl 26 is sec'ur'edto the pawl support by means of rivets 28,

whilst the pawl 27 isadjust'ably mounted onthe pawl support by means of a screw Y carriagesupport 23 to a pin 29 of the pawl support, isintended to bring the oscillating pawl support back to its closing position, whilst a pin 31 secured to the bracket 24 rests againstthe edge of the pawl I support and guides it in a positive manner.

In the position of rest, the escapement wheel 32 is in engagement with the movable The movement of the key lever 1 produces i such a movement of the type bar 3, connected thebuffer 13 of the double-armed lever 12,

to, it by means of the lever 2, that the said type bar, before striking the platen, strikes 14 thus communicating a pressing impulse to it, owing to which the lever 12, 14: which is connected to the pawl support 18 by means of the double-armed lever 15, 16 receives a pressing impulse and is turned, and the pawl support moved back, 'so'thatthe'pawl 27 ad- 'justably mounted on the pawl support, is disengaged from the escapement wheel "which is thus released. The pawl support 18, and with it the universal lever 12, 14 and the intermediate lever 15, 16 are thereupon returned to their original position'by' the tension spring 30. V a That I claim is 1 0 Ti 1. Ina frontestroke typewriting machine provided'wvith type bars, an 'escapement mechanism for controlling the movement of the platen carriage, comprising in combination a double-armed universal lever adapted to be operated at its-upper end near the printing point by any of the typebars, "an

intermediate double-armed lever adapted to turn about an axis parallel to and located below the axis of rotation of the first named universal lever and having its upper arm in contact with the lower arm of the universal lever, aspring actuateddog rocker arranged behind the lower arm of'tlie intermediate,

lever and actuated by pressure exerted by the said lower'arn'i, and an escapement Wheel as described. a a

2. In a front-stroke typewriting machine Y provided with type bars,- an escapement mechanism for controlling the movement of controlled by the said rocker, substantially the platen carriage comprising in combination a substantially straight double-armed universal lever turning about a horizontal axis and adapted to be operated'at its, upper end near the printing-point by any of the type bars, a substantially straight intermediate double-armed lever adapted to turn about a horizontal axis located below the axis of rotation of the first named universal lever and having its upper arm in contact with the lowerarm of the universal lever, said universal and intermediate levers lying in one vertical plane,- a spring actuated dog rocker arranged behind the lower arn ot the intermediate lever and actuated by pressure exerted by the said lower arm, and an cscapement wheel controlled by the said rocker, substantiallyas described. i

3. In a front-stroke typewriting machine provided with type. bars, an escapement mechanism for controlling the movement of the platen carriage comprising in conibina- 3 tion a double-armed universal lever having at its-upper end an elastic buffer and adapted to be operated atits upper end near the printing point byany of the type bars,aii

intermediate double-armed lever adapted to turn about an parallel to and located below the axis of rotation of the'tirst named universal lever and having its upper arm in contact with the lower arm of the universal actuated dog rocker arranged lever, a spring behind the lower arm of the i'ntermediate lever and actuated by pressure exerted by the said lower arm, and an escapement wheel controlled'bythesaid rocker, substantially as described. a. I a I Ina front-stroke typewriting machine provided with typejbars, an escapemeiit 'mechanism for controlling the movement of the platen carriage comprising in combin tion substantially straight double armed 3 7' 7 universal lever'turninn; about a horizontal axis and adapted to be operated at its upper end near the printing point'by any of the type bars, a substantially straight intermediate double-armedlev er adapted to turn about a horizontal'axis and located below the axis of rotation ofthe first named universallever and having its upper arm in contact with the lower arm of the universal lever, said universal and intermediate levers lying in one vertical plane, a'spring actuated dog rocker turning aboutga vertical aizis,

tu ated by pressure exerted by'the said lower arm,-and an escapem'ent'wheel adapted to turn about a horizontal axis and controlled by said rocker, substantially as described. lntestimo'ny whereof I have signed my name to this specification. V

ANDREAS Loon:

said dog'rockerbeiiig arranged behind the 7 lower arm of the intermediate lever and ac 

